* {
    margin: 0;
    padding: 0;
    list-style-type: none;
}

a {
    text-decoration: none;
    color: rgb(221, 192, 192);
}

.waib {
    height: 100vh;
    width: 100vw;
    flex-flow: column;
    display: flex;
}

.head {
    width: 100%;
    height: 100px;
    background-color: rgb(75, 70, 70);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wai {
    display: flex;
    width: 100%;
    height: 100%;
}

.left {
    width: 300px;
    height: 100%;

    background-color: darkgray;
}

.rigth {
    width: 100%;
    height: 100%;
}

.iframe {
    width: 100%;
    height: 100%;
}

.n {
    display: none;
    color: red;
}

.head-right {

    display: flex;
    width: 200px;
    margin-right: 50px;
    justify-content: space-between;

}

.ul-left {
    margin-left: 50px;
    margin-top: 10px;
}

.head-left {
    margin-left: 50px;

}

.yh {
    width: 50px;
}